/Engine/Plugins/Interchange/Runtime/Source/Nodes/Public/InterchangeShaderGraphNode.h
Sets if this shader graph should be considered as a material, false, or a material function, true.
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintCallable, Category="Interchange | Node | Material") bool SetCustomIsAShaderFunction ( const bool & AttributeValue )